Optical gas sensors play an increasingly important role in many applications. Sensing
techniques based on mid-infrared absorption spectroscopy offer excellent stability …

Compared to the gas sensors of electrochemical and semiconductors, the non-dispersive
infrared technique (NDIR) can selectively detect multiple types of gases due to the …

Gas identification and concentration measurements are important for both understanding
and monitoring a variety of phenomena from industrial processes to environmental change …

Currently, the development of smart systems for recognition and sensing of volatile organic
compounds (VOCs) in medical, agricultural, biometric, security and safety, applications is an …

Formaldehyde is considered one of the most valuable and high consumable chemical
compounds in the petrochemical industry, which always have explored and optimized …

Molecular dispersion spectroscopy encompasses a group of spectroscopic techniques for
gas analysis that retrieve the characteristics of the sample from the measurement of the …

A compact multi-bounce attenuated total reflection (ATR) probe combined with a Fabry-Pérot
filter spectrometer (FPFS) has been developed for detection of hydrogen peroxide used for …

This study presents an in-depth review of non-dispersive infrared (NDIR) sensors for
methane detection, focusing on their principles of operation, performance characteristics …

A multi-component Freon gas sensing system was developed based on the non-dispersive
infrared (NDIR) spectroscopy, which had the advantages of simple structure and low cost …

Graphene sheets decorated with nickel or copper oxides that were anchored on polyaniline
(denoted as PANI-graphene/NiO and PANI-graphene/CuO) were prepared by a simple …